basic version of the /events endpoint
add timestamp and change untagged -> untag
add since for polling, rename some vars
add docs
getEvents a bit simpler
use non-blocking channel to prevent dead-lock and add test for server
Add tests for the api
add die event
Merge branch 'master' into 1167_events_endpoint-feature
Merge pull request #1180 from dotcloud/1167_events_endpoint-feature

*Api: Add the /events endpoint
*Client: Add the docker events command